/*
* lttng-ring-buffer-client.h
*
- * Copyright (C) 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
* LTTng lib ring buffer client template.
*
- * Dual LGPL v2.1/GPL v2 license.
+ * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; only
+ * version 2.1 of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/module.h>
/* Stream packet context */
uint64_t timestamp_begin; /* Cycle count at subbuffer start */
uint64_t timestamp_end; /* Cycle count at subbuffer end */
- uint32_t events_discarded; /*
+ uint64_t content_size; /* Size of data in subbuffer */
+ uint64_t packet_size; /* Subbuffer size (include padding) */
+ unsigned long events_discarded; /*
* Events lost in this subbuffer since
* the beginning of the trace.
* (may overflow)
*/
- uint32_t content_size; /* Size of data in subbuffer */
- uint32_t packet_size; /* Subbuffer size (include padding) */
uint32_t cpu_id; /* CPU id associated with stream */
uint8_t header_end; /* End of header */
} ctx;
header->stream_id = lttng_chan->id;
header->ctx.timestamp_begin = tsc;
header->ctx.timestamp_end = 0;
+ header->ctx.content_size = ~0ULL; /* for debugging */
+ header->ctx.packet_size = ~0ULL;
header->ctx.events_discarded = 0;
- header->ctx.content_size = 0xFFFFFFFF; /* for debugging */
- header->ctx.packet_size = 0xFFFFFFFF;
header->ctx.cpu_id = buf->backend.cpu;
}
unsigned long records_lost = 0;
header->ctx.timestamp_end = tsc;
- header->ctx.content_size = data_size * CHAR_BIT; /* in bits */
- header->ctx.packet_size = PAGE_ALIGN(data_size) * CHAR_BIT; /* in bits */
+ header->ctx.content_size =
+ (uint64_t) data_size * CHAR_BIT; /* in bits */
+ header->ctx.packet_size =
+ (uint64_t) PAGE_ALIGN(data_size) * CHAR_BIT; /* in bits */
records_lost += lib_ring_buffer_get_records_lost_full(&client_config, buf);
records_lost += lib_ring_buffer_get_records_lost_wrap(&client_config, buf);
records_lost += lib_ring_buffer_get_records_lost_big(&client_config, buf);
{
}
+static struct packet_header *client_packet_header(
+ const struct lib_ring_buffer_config *config,
+ struct lib_ring_buffer *buf)
+{
+ return lib_ring_buffer_read_offset_address(&buf->backend, 0);
+}
+
+static int client_timestamp_begin(const struct lib_ring_buffer_config *config,
+ struct lib_ring_buffer *buf,
+ uint64_t *timestamp_begin)
+{
+ struct packet_header *header = client_packet_header(config, buf);
+ *timestamp_begin = header->ctx.timestamp_begin;
+
+ return 0;
+}
+
+static int client_timestamp_end(const struct lib_ring_buffer_config *config,
+ struct lib_ring_buffer *buf,
+ uint64_t *timestamp_end)
+{
+ struct packet_header *header = client_packet_header(config, buf);
+ *timestamp_end = header->ctx.timestamp_end;
+
+ return 0;
+}
+
+static int client_events_discarded(const struct lib_ring_buffer_config *config,
+ struct lib_ring_buffer *buf,
+ uint64_t *events_discarded)
+{
+ struct packet_header *header = client_packet_header(config, buf);
+ *events_discarded = header->ctx.events_discarded;
+
+ return 0;
+}
+
+static int client_content_size(const struct lib_ring_buffer_config *config,
+ struct lib_ring_buffer *buf,
+ uint64_t *content_size)
+{
+ struct packet_header *header = client_packet_header(config, buf);
+ *content_size = header->ctx.content_size;
+
+ return 0;
+}
+
+static int client_packet_size(const struct lib_ring_buffer_config *config,
+ struct lib_ring_buffer *buf,
+ uint64_t *packet_size)
+{
+ struct packet_header *header = client_packet_header(config, buf);
+ *packet_size = header->ctx.packet_size;
+
+ return 0;
+}
+
+static int client_stream_id(const struct lib_ring_buffer_config *config,
+ struct lib_ring_buffer *buf,
+ uint64_t *stream_id)
+{
+ struct packet_header *header = client_packet_header(config, buf);
+ *stream_id = header->stream_id;
+
+ return 0;
+}
+
+static int client_current_timestamp(const struct lib_ring_buffer_config *config,
+ struct lib_ring_buffer *bufb,
+ uint64_t *ts)
+{
+ *ts = config->cb.ring_buffer_clock_read(bufb->backend.chan);
+
+ return 0;
+}
+
static const struct lib_ring_buffer_config client_config = {
.cb.ring_buffer_clock_read = client_ring_buffer_clock_read,
.cb.record_header_size = client_record_header_size,
void lttng_event_write_from_user(struct lib_ring_buffer_ctx *ctx,
const void __user *src, size_t len)
{
- lib_ring_buffer_copy_from_user(&client_config, ctx, src, len);
+ lib_ring_buffer_copy_from_user_inatomic(&client_config, ctx, src, len);
}
static
.get_hp_wait_queue = lttng_get_hp_wait_queue,
.is_finalized = lttng_is_finalized,
.is_disabled = lttng_is_disabled,
+ .timestamp_begin = client_timestamp_begin,
+ .timestamp_end = client_timestamp_end,
+ .events_discarded = client_events_discarded,
+ .content_size = client_content_size,
+ .packet_size = client_packet_size,
+ .stream_id = client_stream_id,
+ .current_timestamp = client_current_timestamp,
},
};